Muffler.



C. A. MILLER.

M'lIJFFLER. APPLICATION FILED MAY24, l9l5.

Patented Sept 7-, 1915.

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' ATTORNEYS UNITED STATES PATENT OFFICE.

I CARMI A. MILLER, 01 SPRING- VALLEY, ILLINOIS, ASSIGNOR F ONE-HALF T0JOHN FENTON MILLER, OF SPRING VALLEY, ILLINOIS.

MUFFLER.

Specification of Iietters Patent.

Patented Sept. 7, 1915.

To all whom it may concern Be it lmown that I, GARMI A. MILLER, acitizen of the United States, and a resident of Spring Valley, in thecounty of Bureau and State of Illinois, have invented an improvement inMulflers, of which the following is a specification.

This invention relates to mufflers and more particularly to one adaptedfor use in connection with combustion engines.

An object of the invention is the provision of a plurality of baflleplates arranged in a' novel manner in the casing of the mufiler wherebythe force of the exhaust gases is retarded and the noise occasionedthereby reduced to a minimum.

A further object is to provide means whereby the battle plates may beadjusted in order that the same may be cleansed by the.

force of the exhaust passing through the cylinder, thus obviating thenecessity of taking the plates and other connections out of the casingin order to remove accumulations of soot, grease and the'lilre.

A still further object is baflle plates in the provision of area of theengine exhaust pipe, thereby trating the invention, is shown in theaccompanying drawing; but it is to be expressly understood that theparticular construction shown in the drawing is used merely tofacilitate the description of the invention as a whole and not to definethe limits thereof,

' reference being had to the appended claims for this purpose. In thedrawin vation of the m away 2 is a vertical longitudinal sectional viewon the line 2-2 of Fig. 1 showing the parts in normal position. Fig. 3is a fragmentary side elevation with the casing broken away and showingthe parts in their adjusted position in order that the same may becleansed by the passage s:.Figure 1 is a sideeleer, the casing being.broken 4 is a transverse section on the line 44 of Fig.1, and Fig. 5 isa perspective view of one group of bafile plates, the same beingseparated for purposes of better illustration.

which the area of the byv passes thereof is equal to or greater than theto show the interior construction. Fig.

of v the exhaust the ends thereof. The head 12 to which. the outlet 14is secured is rovided with an inturned annular flange 1 upon which ismounted a baflile ring 18 which is in longi tudinal alinement with theinlet 13.

plurality of stationary rings 19 are preferably spaced equidistant apartin the casing 10 concentrically thereof and each ringis provided with anouter flange 20 which en ages the inner periphery of said caslng. achring 19 is also provided with an lnner flan e 21 arranged concentricallyto the outer ange 20 and has therein the diametrically disposed radiallyextending 4 openings 22 adapted to receive the pivot or swivel plns 23.

Each ring 19 has mounted therein exhaust I retarding means consisting ofa central baflle plate 24 having a diameter equal to the interiordiameter of said ring and provided with diametrically disposed sockets25 adapted to receive the inner ends of the pins 23 whereby said plateis pivoted or swiveled in the ring. lhe plate 24 is provided with acentral opening 26 adapted for the passage of the exhaust gasestherethrough when the parts are in the position shown in Fig. 2. Abafile plate 27 is secured on each side of the central plate-24 andspaced therefrom by means of sleeves 28 carried by said central plateand adapted to have the small bolts 29 passed .therethrough whereby theplates 24 and 27 are retained in position. The plates 27 are of asmaller area than the plate 24 and are arranged concentrically withinthe peripheral edges of the flange 21 of the ring 19 whereby an annularspace is formed between said flange and the periphery of the plates 27to permit of the passage of the exhaust gases therethrough. It will thusbe seen that the exhaust entering the inlet 13 will pass aroundtheadjacent plate 27 of .the first series, thence through'the opening 26 inthe central plate and then around the other plate 27 of said series andthat the force of the exhaust will be repeatedly retarded in its passagethrough the casing so that the noise occasioned thereby when passingthrough the outlet will be reduced to a minimum.

Means-are provided in this invention for the adjustment of the groups ofbafiie plates whereby the same may be moved to positions parallel to thelongitudinal axis of the casing and substantially in alinement with theinlet 13 and baflle ring 18, as shown in Fig. 3, in order that thedirect force of the exhaust may be applied thereto to remove anyaccumulation of soot, grease or the like thereon. For this purpose theplate 27 of each group which is farthest away from the inlet 13 isprovided with a pair of ears 30 adapted to have'pivoted therebetween oneend of a lever 31. The other end of the lever 31 is pivoted to a collar32 secured to an operating rod 33 which extends longitudinally of thecasing 10, said rod being connected to suitable means, not shown, for

operating the same, preferably from the drivers seat of a vehicle. Acoil spring 34: is mounted between one of the collars 32 and theadjacent ring 19 for returning the parts to normal position as shown inFig. 2, said spring being compressed when a pull is exerted on saidoperating rod. The end of each lever 31 which is pivoted to the plate 27is provided with an angular extension 35 forming the right angular faces36 and 37, the face 36 of the extension 35 being adapted to engage theadjacent face of the plate 27, as shown'in Fig. 1, whereby movement ofthe baffle plates of each series is limited in one. direction andretained in positions extending transversely of the casing. The face 37of each lever 31 is also adapted to engagethe adjacent face of the plate27 when the parts are in the position shown in Fig. 3, thereby limitingthe movement of said plates to their adjusted positions.

The area of the o ening 26 and the space between the plates 2? and thering 19 of each group is equal to or greater than the area of theexhaust pipe of the engine whereby back pressure to the latter isavoided.

I claim 1. A mufller comprising a series of bafile plates arranged ingroups, each group consisting of a central-plate having an openingtherein and another plate of smaller area arranged on each side of saidcentral plate.

2. muffler comprising a series of bafiie plates arranged in groups, eachgroup consisting ofa central plate having a central opening therein, andanother plate of smaller area arranged concentrically on each side ofsaid central plate.

3. A mufiier comprising a series of bafile plates arranged in groups,each group consisting of a pivoted central plate having an openingtherein, another plate of smaller area arranged on each side of saidcentral plate, and means for securing said plates together.

4. A muffler comprising a casing, a plurality of rings mounted in saidcasing, a central baffle plate swiveled in each ring and having anopening therein, and another baffle plate of smaller area than saidcentral plate arranged on each side thereof and spaced therefrom. Y

5. A muffler comprising a cylindrical casing having an inlet and outlettherefor, a baffle ring mounted adjacent said outlet and in alinementwith said inlet, a plurality of spaced rings mounted in said casing, acentral baffle plate swiveled in each of said rings and having anopening therein, another baffle plate of smaller area than said centralplate arranged on each side thereof and concentrically therewith, meansfor connecting said baflle plates in spaced relation, an o crating rodextending longitudinally of sald casing, and a lever pivoted to said rodand one of the last-named baffle plates of each series whereby saidbafiie plates may be swung about. their pivots.

6. A mufller comprising a cylindrical casing having an inlet and outlettherefor, a baflie ring mounted adjacent said outlet and in alinementwith said inlet, a plurality of spaced rings mounted in said casing, acentral baffle plate swiveled in each of said rings and having anopening-therein, an-

other bafiie plate of smaller area than said central plate arranged oneach side thereof and concentrically therewith, means for connectingsaid baflie plates in spaced relation, an operating rod extendinglongitudinally of said casing, and a lever pivoted to said rod and oneof the last-named baflie plates of each series whereby said baflleplates may be swung about their pivots, said ever being formed withabutting faces adapted for engagement with the adjacent bafiie platewhereby movements of said plates to their adjusted and normal positionsare limited.

7 A muflier comprising a cylindrical casing having an inletv and outlettherefor, a baflle ring mounted adjacent said outlet and in alinementwith said inlet, a plurality of spaced rings mounted in said casing, acentral bafiie plate swiveled in each of said rings and having anopening therein, another bafile plate of smaller area-than said centralplate arranged on each side thereof and concentrically therewith, meansfor connecting said baflle plates in spaced relatlon, an operating rodextending longitudinally of said casing, a lever pivoted to said rod andone of the last-named baifle plates of each series whereby said bafileplates may be swung about their pivots, said lever being formed withabutting faces adapted for enfor returning said plates to their normalposition.

8. A muflier comprising a casing, a rmg mounted therein and havingradially extending and diametrically opposed pivot openings, pivots insaid openings, and an exhaust retarding plate carried by said pivots andadjustable substantially as set forth.

9. A muflier comprising a casing a plurality of baflie members normallyarranged transversely of said casing, means for adjusting said membersso as to extend parallel to a plane of the longitudinal axis of saidcasing, means for returning said mem bers to normal position, and meansadapted for engagement with said members for limiting the movementsthereof to their adjusted and normal position.

10. A muflier comprising a casing, exhaust retarding means in saidcasing, means for adjusting said retarding means whereby the latter areautomatically cleansed by the exhaust, and means adapted to engage saidretarding means to limit the adjustment thereof.

11. A. mufiler comprising a casing having an inlet and outlet therefor,spaced rings mounted in said casing, bafile members associated with eachof said rings and adapted to normally extend transversely of saidcasing, and means in said casing extending lon gitudinally thereof andhaving a bearing in said rings for adjusting said bafile members toextend longitudinally of the casing.

12. A mufiler comprising a casing having an inlet and outlet therefor,spaced rings mounted in said casing, baflle members associated with eachof said rings and adapted to normally extend transversely of saidcasing, means in said casing extending longitudinally thereof and havinga bearing in said rings for adjusting said baffie members to extendlongitudinally of the casing, and means adapted to engage certain ofsaid baffle members for limiting the adjustment thereof.

CARL DI A. MILLER. Witnesses:

GERALD R. Bass, WM. F. GUNTHER.

